Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 40% to 93.
The number of red stickers is decreased by 20% to 60.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Green |
Red |
Before |
100% |
100% |
Change |
- 40% |
- 20% |
After |
60% = 93 |
80% = 60 |
(a)
100% - 40% = 60%
60% of green stickers = 93
100% of green stickers =
9360 x 100 = 155
100% - 20% = 80%
80% of red stickers = 60
100% of red stickers =
6080 x 100 = 75
Number of stickers at first
= 100% of green stickers + 100% of red stickers
= 155 + 75
= 230
(b)
Number of stickers in the end
= 93 + 60
= 153
Answer(s): (a) 230; (b) 153